Ask your ETL-HR. Be sure to ask them explain the complicated rules on what payment types are excluded from the 10% discount.
Excluded payment types for TM discount are: VISA, Mastercard, amex or discover credit or debit card, or PIN debit, unless it's from Target Credit Union.
Eligible forms of payment for TM discount: Cash, check, Target CU debit and Target CU credit card are eligible for 10% TM discount.
Eligible also for TM discount: redcard - total discount becomes 14.5%.
Eligible also for TM discount is a target giftcard BUT the rules say you aren't supposed to buy yourself a giftcard using excluded payment types to "evade" the rules.
Target's discount rules are complicated. Ask HR to explain or print out the rules, to avoid missing out on the discount.